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<== Date ==> <== Thread ==>

Subject: Re: Archive Dump on Change Only
From: Maren Purves <m.purves@eaobservatory.org>
To: tech-talk@aps.anl.gov
Date: Mon, 14 Aug 2017 11:04:09 -1000
On 08/14/17 01:07, Michael Davidsaver wrote:
On 08/13/2017 03:28 PM, Hidas, Dean wrote:
Greetings EPICS Experts,

I am trying to dump archive data for some setpoints but am only interested in values when they change.  Is there an easy way to only print out values only once they change?  I was trying something like the following:

arget -s '2016-8-1 00:00:00' -e '2017-8-1 00:00:00' -c 1000 PVNAME

but this gives:
...
2016-10-19 16:58:58.343624 220.0
2016-10-19 16:58:59.367182 220.0
2016-10-19 16:58:59.877238 220.0
2016-10-19 16:59:00.399215 220.0
...

At first glance this seems like a mis-configuration of the archiver, or
noise.  I certainly wouldn't want so much redundant data to be stored.
In either case, I'd suggest looking at the ADEL field of this record to
see if it should be increased.

It depends. Some things aren't supposed to change but you
may still want to know whether they got archived (implying
that they got read out, which in our case sometimes they
don't, which is also a problem).

Maren

Replies:
RE: Archive Dump on Change Only Laznovsky Michael (PSI)
References:
Archive Dump on Change Only Hidas, Dean
Re: Archive Dump on Change Only Michael Davidsaver

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